Contessa Picatinny Rail for Mauser M12, extended for NV

About Picatinny Rail

The Picatinny rail system features slots spaced at precise 5.23 mm intervals, enabling consistent and versatile use along its entire length. This system is designed for ease of mounting and is universally compatible; accessories designed for a Picatinny rail will fit seamlessly, irrespective of the manufacturer or the date of production. Known for its affordability, durability, and reliability, the Picatinny rail is a popular choice among professionals and military personnel, making it a dominant player in the scope mounts market in recent years.
The Picatinny design marks a significant advancement over the older Weaver standard. Unlike the Weaver system, which offers only a few predetermined slots, the Picatinny rail boasts continuous slots across its surface. This feature provides the flexibility to mount devices at any preferred location. Additionally, the slots on a Weaver rail are narrower, at 3.8 mm, allowing mounts designed for Weaver rails to fit on a Picatinny rail. However, mounts specifically made for Picatinny rails do not fit on Weaver rails due to the size difference of recoil stoppers. This compatibility and versatility make the Picatinny rail a superior mounting solution in various applications.

About the Contessa

Contessa, an Italian manufacturer renowned for its high-quality scope mounts, combines decades of experience with advanced 3D technology and precision handcrafting. Recognized internationally, its mounts are not only functional but also aesthetically pleasing, featuring soft, rounded edges. Contessa Picatinny rails are machined to strict tolerances, and  feature one of the best fit and finish. Each rail bears the distinctive golden Contessa logo, symbolizing quality and craftsmanship.

About the Mauser

Mauser, founded in 1811 in Oberndorf, Germany, started as a royal weapon forge and gained fame with the rotating bolt system. This innovation set the stage for the iconic Mauser Gewehr 98, which influenced global military rifle designs. Post-World War II, the factory was dismantled, but Mauser continued to innovate, later merging into what is now known as Mauser-Werke Oberndorf Waffensysteme GmbH. Today, it operates under the Blaser Group, continuing its legacy with models like the M03, M12, and M18​​.

About the M12 (pre-2019)

The Mauser M12 (pre-2019) is a push-feed bolt-action rifle, introduced in 2012. It shares similar features with the Mauser M98, including the same mounting surface until 2019, when the receiver shape was updated to match that of the Remington 700 LA. The rifle supports both standard and magnum cartridges with its high-quality polymer detachable magazine. Barrel lengths for the M12 vary, including options of 620 mm, 560 mm, 510 mm, and 470 mm​​.

Variants

Mauser M12 is available in the following variants:

• Mauser M12 Pure
• Mauser M12 Expert
• Mauser M12 Max
• Mauser M12 Extreme
• Mauser M12 Impact
• Mauser M12 Trail

Calibres

Mauser M12 can be chambered for the following calibres:

• .22-250 Rem.
• .243 Win.
• 6.5x55 SE
• .270 Win.
• 7mm Rem. Mag.
• 7x64
• .308 Win.
• .30-06 Spr.
• .300 Win. Mag.
• 8x57 JS
• .338 Win. Mag.
• 9.3x62

Design of the Rail

The Contessa Picatinny Rail for Mauser M12, extended for NV is constructed from steel, known for its superior hardness and durability compared to aluminum, ensures a higher degree of repeatability with less wear over time. The rail extends back towards the shooter because night vision devices need less eye relief and must be positioned further back on the firearm. The picatinny rail features 20 slots and 4 mounting holes, all secured with M3.5 threading. A distinct central bon the rail allows for the concurrent use of the rifle's iron sights, offering a reliable backup sighting solution without the need to remove the picatinny rail when there is nothing mounted on it. This picatinny rail is attached to the rifle with four screws.

Mounting Dimensions

• A=21.9mm
• B=101.7mm
• C=12.7mm
• BHU=4.0mm
• R1=14.5mm
• R2=18mm

This rail can also be mounted on:

Usually, a Picatinny rail can be mounted on multiple different rifles if they share the same mounting surface, which we commonly refer to as the mounting standard. The Contessa Picatinny Rail for Mauser M12, extended for NV can be mounted on the following rifles, which share the same mounting standard:

• Mauser M98 Standard
• Mauser 98 Action (Without Bulb)
• Musgrave K98

Mounting Instructions

Remove all the stains (grease, oil etc.) from the rifle's receiver with a cleaning fluid (acetone). Once the surface is clean and dry, check whether the screws match the rail and the holes on the receiver. Before mounting the rail permanently, apply a minimal amount of thread-locking fluid 278 or 648 on screws. Be careful not to get the fluid in or near the mounting holes. Carefully clean the remaining excess fluid around the rail with a cleaning fluid. Using a torque driver, screw the screws appropriately (up to 3 Nm/26.5 in-lbs).
If you require any mounting tools, you can find them on our Rifle Scope Mounting Tools page.

What's in the box?

Each package comes complete with one steel rail, a sturdy wrench for easy installation, and four screws to securely attach the rail to your firearm.

Warranty

This product comes with a 30-year warranty.